From bb539bf973bb861ffe8179ac8791fad19448cd52 Mon Sep 17 00:00:00 2001
From: Nadav Rotem <nadav.rotem@intel.com>
Date: Wed, 9 Nov 2011 13:21:28 +0000
Subject: Add AVX2 support for vselect of v32i8

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144187 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86ISelLowering.cpp |  2 ++
 lib/Target/X86/X86InstrSSE.td      |  6 ++++++
 test/CodeGen/X86/avx2-logic.ll     | 19 +++++++++++++++++++
 3 files changed, 27 insertions(+)

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index e5d3c91fd0..c34f225dc5 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -1050,6 +1050,8 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
       setOperationAction(ISD::MUL,             MVT::v4i64, Custom);
       setOperationAction(ISD::MUL,             MVT::v8i32, Legal);
       setOperationAction(ISD::MUL,             MVT::v16i16, Legal);
+
+      setOperationAction(ISD::VSELECT,         MVT::v32i8, Legal);
       // Don't lower v32i8 because there is no 128-bit byte mul
     } else {
       setOperationAction(ISD::ADD,             MVT::v4i64, Custom);
diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index 8648d48cdb..068e223e59 100644
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -6568,6 +6568,12 @@ let Predicates = [HasAVX] in {
             (VBLENDVPDYrr VR256:$src2, VR256:$src1, VR256:$mask)>;
 }
 
+let Predicates = [HasAVX2] in {
+  def : Pat<(v32i8 (vselect (v32i8 VR256:$mask), (v32i8 VR256:$src1),
+                            (v32i8 VR256:$src2))),
+            (VPBLENDVBYrr VR256:$src2, VR256:$src1, VR256:$mask)>;
+}
+
 /// SS41I_ternary_int - SSE 4.1 ternary operator
 let Uses = [XMM0], Constraints = "$src1 = $dst" in {
   multiclass SS41I_ternary_int<bits<8> opc, string OpcodeStr, Intrinsic IntId> {
diff --git a/test/CodeGen/X86/avx2-logic.ll b/test/CodeGen/X86/avx2-logic.ll
index a763bc0010..944849cf4f 100644
--- a/test/CodeGen/X86/avx2-logic.ll
+++ b/test/CodeGen/X86/avx2-logic.ll
@@ -1,6 +1,8 @@
 ; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=core-avx2 -mattr=+avx2 | FileCheck %s
 
+; CHECK: vpandn
 ; CHECK: vpandn  %ymm
+; CHECK: ret
 define <4 x i64> @vpandn(<4 x i64> %a, <4 x i64> %b) nounwind uwtable readnone ssp {
 entry:
   ; Force the execution domain with an add.
@@ -10,7 +12,9 @@ entry:
   ret <4 x i64> %x
 }
 
+; CHECK: vpand
 ; CHECK: vpand %ymm
+; CHECK: ret
 define <4 x i64> @vpand(<4 x i64> %a, <4 x i64> %b) nounwind uwtable readnone ssp {
 entry:
   ; Force the execution domain with an add.
@@ -19,7 +23,9 @@ entry:
   ret <4 x i64> %x
 }
 
+; CHECK: vpor
 ; CHECK: vpor %ymm
+; CHECK: ret
 define <4 x i64> @vpor(<4 x i64> %a, <4 x i64> %b) nounwind uwtable readnone ssp {
 entry:
   ; Force the execution domain with an add.
@@ -28,7 +34,9 @@ entry:
   ret <4 x i64> %x
 }
 
+; CHECK: vpxor
 ; CHECK: vpxor %ymm
+; CHECK: ret
 define <4 x i64> @vpxor(<4 x i64> %a, <4 x i64> %b) nounwind uwtable readnone ssp {
 entry:
   ; Force the execution domain with an add.
@@ -36,3 +44,14 @@ entry:
   %x = xor <4 x i64> %a2, %b
   ret <4 x i64> %x
 }
+
+
+
+; CHECK: vpblendvb
+; CHECK: vpblendvb %ymm
+; CHECK: ret
+define <32 x i8> @vpblendvb(<32 x i8> %x, <32 x i8> %y) {
+  %min_is_x = icmp ult <32 x i8> %x, %y
+  %min = select <32 x i1> %min_is_x, <32 x i8> %x, <32 x i8> %y
+  ret <32 x i8> %min
+}
-- 
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